One vertex per element, one color per generator, with an edge from x to x·s.
(2,5)(6,8)(10,13)(11,15)(17,18)(19,20)(21,25)(22,23)(24,26)(27,28)(29,32)(30,31) involution — undirected(1,2,4,5)(3,6,7,8)(10,13)(14,16)(9,10)(11,14)(12,13)(15,16)(18,23)(19,26)(25,31)(27,32) involution — undirected(9,11)(10,14)(12,15)(13,16)(17,19)(18,24)(20,23)(21,27)(22,26)(25,29)(28,31)(30,32) involution — undirected(1,3,4,7)(2,6,5,8)(17,20,22,24)(18,19,23,26)(21,29,30,28)(25,32,31,27)(17,21,22,30)(18,25,23,31)(19,27,26,32)(20,28,24,29)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.